Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Helena, MT

<< 1 2 3 4 5 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-438 2 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-438 3 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-438 4 MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-04-01   
406-438 5 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-07-14   
406-438 6 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-11   
406-438 7 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-438 8 GRFLMTMAHMD  073H TELNYX LLC 648   2023-12-09   
406-438 9 GRFLMTMAHMD  073H TELNYX LLC 648   2023-12-09   
406-439 A MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 0 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 1 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 2 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 3 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 4 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 5 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 6 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 7 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 8 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 9 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-440 A HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 0 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 1 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 3 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 4 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 5   6529 T-MOBILE USA, INC. 648   2024-02-22   
406-440 6   6529 T-MOBILE USA, INC. 648   2024-02-22   
406-440 8 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 9 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-441 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-442 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-443 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-444 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 1 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 2 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 3 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 4 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 5 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 6 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 7 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 8 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 9 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-449 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 0 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 1 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 2 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 3 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 4 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 5 HLNAMTMADS0  9636 QWEST CORPORATION 648      

<< 1 2 3 4 5 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.